Water-tube boiler.



- Patented Sept. l8, I900. J. F. CASEY &. M. M. HEDGES.

WATER TUBE BOILER.

[Applicatiolfiled Feb. 17, 1899.)

- (No Model.) 0 2 Sheets-Shed I.

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No. 658,003. Patented Sept. l8, I900,

J. F. CASEY & M. M. HEDGES.

WATER TUBE. BOILER.

(Application filed F eb. 1'7, 1899.)

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UNITED STATES.

PATENT OFFICE.

JAMES F. CASEY AND MERTLAN M], HEDGES, OF or A rTAnooeA TENNEs: SEE, ASSIGNORS TO THE cAsEY '& nnncns MANUFACTURING COMPANY,

' OF SAME PLACE. Q

.WATE'R-TUBE BQIILER.

SPECIFICATION forming part of Letters Patent N 0. 658,003, dated September 18, 1900.

Application filed February 17, 1899; Serial No. 706,755- (No model.)

To all whom it may concern:

Be it known that we, JAMES F. CASEY and MERTLAND M. HEDGES, citizens of the United States, residing at Chattanooga, in the county of Hamilton and State of Tennessee, have in vented certain new and useful Improvements in Water-Tube Boilers, of which the following is a specification. A A

Our invention relates to-improvementsin steam-boilers; and the object of our invention is to provide a steam-boiler formed of sepae. irate units so arranged and constructed that the heat products are utilized to the fullest extent and a perfect circulation of the boiler maintained, the construction of the boiler being extremelysimple and readily adapted to the various uses for which'it' may be em-' ployed v In the accompanying drawings, Figure 1 is a. rear View of the'boiler proper 'with'the incasing walls in section, showing the arrange.

ment of the units and their circulating .connections. Fig. 2 is a sectional view through the furnace, showing the boiler in side elevation and installed in connection with a double furnace.

Like parts are represented by similar. .letters of reference in both views." 7

In the said drawings, A represents the outer casing, which may be of any suitable material, but preferably brick, built up in the usual manner for inclosing a boiler. The boiler proper consists of two units, each of which is made up of upper and lower drums B and B and G and C, the upper drums B and 0 being connected to the lower drums B and O by series of vertical tubes D and D, which are adapted to preferably fill up or utilize all the available space of the bottom and top heads of the respective drums B and O and B and O. In constructing these units the upper heads of the upper drums and the lower heads of the lower drums are dished or crowning, the remaining heads of the drums where the tubes are attached being preferably straight, the tubes being connected to the said heads in the usual Way. In forming the boiler from these respective units the units are mounted side by side and are connected together by T connections d and 01 which T connections are also connected together bya vertical pipe (2. These connections d and (1 enter the respective drums B and O and B "and 0 below the Water-line, the upper drums being further connected by the steam-pipef,

through which the steam is drawn. I11 order to insure the proper circulation, the respective units are separated .by a bridge-wall, as shown at e, and which surrounds the pipe 01. This bridge-wall serves the double purpose of confining the heat products to the nests .of tubes Dvand D, and at the same time protecting the vertical circulating-pipe d from the heat products of the furnace. The respective boiler units are supported from the top drums B and O, as shown, by the supports lb and c,.which rest upon the incasing walls in the usual way. I Asbefore stated, we. have shown in Fig. 2 a double furnace, or, in fact,- two furnaces F and F, oneon each side of the boiler. This arrangement is preferably provided for 10- calities in which bagasse or other waste prodhats are utilized for steaming-as, for instance, in the sugar districts of the South. When this construction is used, the furnace F. is arranged with the ordinary grate-bars f and is,adapted .for burning coal or similar fuel, while the furnace. F. is provided with hollow-blast grate-barssuch, for instance,as described in our former patent, No. 579,955- and it is preferably further provided with an openingf at the top of the furnace, through which the bagasse may be fed by the aid of a self-feeder, which is generally used with bagasse-furnaces. While this construction is considered a desirable one for bagasse and similar substances, it is by no means essential, as it is obvious that the boiler may be used with either of said furnaces alone.

The outer walls or casings are preferably provided with suitable openings or manholes f and f arranged at proper intervals, so as to communicate to the boilers and that part of the boilers which extends above the fur- 5 naces, through which access may be had for cleaning the outer surfaces of the tubes.

In operation the products of combustion from either or both of the furnaces pass in the direction of the arrows in direct contact I00 within the incasing walls, so that the heat" products surround the lower part thereof and are discharged through the outlet f into the stack or uptake at a poinhopposite-the said drum.

By the arrangement thus described it'will be seen that a very simple and economical boiler constructioniis' secured; andith'is-" conv struction, in combinationwiththebOilGl'rSGiST- ting, produces a boiler in which the heat: products are utilized totlre fullestaextentyand v a perfect circulation of'the boiler-insured;

is very great. to the lower drums, asindicatedatg, andlin:

asmuch as therlower: drums-iareprotectedi from the heat products bybeing below" the furnace-line the feed-water will bergrad ually intermingled with the rapidaci-rculationof the tubes and be perfectly assimilated;

Having thus described our: inventionpwe.

claim 1. A boiler such as described consistingof units, each of which is made'up of: upperand: lower drums-connected together by. vertical tubes as described, and at the; top uearthe bottom of the upper drums 3.11111 atrthe bottom near the top of the lowerdrums pipes carryingT connections, whichfi'w connections" are connected by a circulating-pipe in combiifnation with a furnace having a-bridgeaWall;

which surrounds said circulating-pipe, sub stantially as specified.

2., In: a boiler-e suchas described, the arrangement of the units each consisting of upper and lower drums connected together by ,tubesas described, and a central protected circulating-pipe of a larger body than the said tubes, ,the.loweridrumsrbeing placed below the furnace-line, substantially as and for the purpose specified.

3. The combination with the boiler consistring, oft-two units each consisting of upper and lower drums connected together by vertical tubes, an outer casing surrounding said boilers, said casingbeingprovided with a bridge fwallwliich separates said units and circulating-pipe connecting the upper and lower drums of said units protected by said bridge-- wall, and a furnace-extendingacrossthe re- ,spectiv-e un-its, substantially as :described. 4;. A boilertsuch -asdescribed, cons-istingiof iunits; each ofv which is made up of upperand Tflower drums connectedtogether by. vertical tubes' as described; and: at! the top near the fbottomofithe upper: drums and bottom near the top of the lower drums bypipescarrying ,T, connections; which T connections are conneeted bya circulating-pipe of larger body ;lthan saidltubes, an= outer casing for: said iboilerrwithithe furnace extendingacross the respective units thereof, a bridge-Wall exgtendingthroughoutr the height; of" the com: bt1stion-chambe1"off saidtfurnace and inclos- 'ing 7 said circulating-pipe: throughout its entire length; outlets for said combustion-chambers near the top thereof, feed-water-supply inletsa inu-the :lower drums of' said boiler: and steam-outlets in the upper drums r thereof, substantially as andfor the purpose specified.

In'testimon-y whereof; we-have-hereuntoset ourwhands this 10th dayiof February, A. D. 1899.

JAMES F; (BASE-Y. MERTLAND MLHEDGESL Witnesses:

O. J. CORE, S. D: BRADY. 

